For a client from the brewing industry, the ATAMIQ team proposed a solution to ensure biogas pressure in a wastewater treatment plant. The technological scheme proposed in the working project for the operation of two gas blowers in parallel was subject to change because it is inapplicable under the specific conditions in the particular case. This type of solution (working and backup blower) is implemented in processes where the biogas supply is critical and should not be interrupted.
The client
The client is one of the largest breweries with over 130 years of history in beer production. Beer production requires a large amount of water, especially in the brewing, bottling and cleaning processes. The generated by-products, including slurry and excess yeast, are major pollutants which, in combination with the dissolved sugar, soluble starch, ethanol and volatile fatty acids present in the wastewater, challenge the WWTP process scheme. Wastewater is treated through an anaerobic reactor, where the majority of COD and nutrients are converted into biogas.
Selected technology
According to the technological scheme of the WWTP, biogas is used to feed a gas boiler, through which the raw waste water is heated. Currently, the excess amount of biogas is burned in a closed type flare, but the Atamik team has made a proposal to the client for the installation of a generator/cogenerator to produce green energy for the enterprise’s needs.
Selected ATEX type blower for biogas (side channel type) are used to extract or compress combustible gases fall into the Class II equipment group. Following the requirements of Directive 2014/34/EU, category 2 for both environmental and machine conditions. Their main advantages are the following:
- their rotating parts are not in contact with the housing, which does not form friction processes and no internal lubrication is required. The gas remains uncontaminated;
- lack of vibration, which leads to the stability of the gas pipeline installation;
- easy installation and minimal maintenance
Our solution
For the stable functioning of the system, it is necessary to use an ATEX gas blower, with which 100 mBar can be provided at the burner inlet. Considering the gasholder pressure (34±5mBar), the blower is expected to transport at most 70 m3/h, at 15 mBar differential pressure.
To meet the technical requirements of the project, we proposed to install one biogas blower with a flow rate of 2x70m3/h with inverter control to ensure a constant pressure regardless of consumption. The expected thermophilic temperature mode of operation 80/60C will be realized by retrofitting the boiler with a kit to increase the temperature of the return water to avoid condensation
#Know-How
Water sustainability has become an important issue for FMCG companies. Breweries around the world regularly publish information on water consumption and are committed to reducing their carbon and water footprints. Due to the rapidly increasing costs of process water and wastewater, proactive water management and wastewater treatment are of increasing importance in the beer and beverage industry. Significant reductions in process water treatment costs are achieved through on-site wastewater treatment. Anaerobic treatment converts organic components into valuable biogas, thereby reducing disposal costs and energy costs at the same time. The flow rate and chemical composition of wastewater often vary widely. This is a normal consequence of the brewing and distilling process, but requires a flexible work setup and an experienced partner in the field.
ATAMIQ’s experience in the construction of treatment plants, as well as installations for the production of biogas, helps our customers to implement technologies by means of which to:
- Reduce energy costs by up to 15% by generating renewable energy from waste water through biogas recovery plants;
- Reduce costs per unit of treated water, complying with environmental regulations;
- Reduce water consumption;
- They recycle process water.
Contacts:
If you also have a project for biogas blowers, do not hesitate to contact our specialist on email sales@atamiq.com or phone +359886163199
